Ear plug



FIG. 1 is front perspective view of an ear plug, showing my new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a side elevational view thereof; and,

FIG. 5 is a bottom plan view thereof. 

The ornamental design for an ear plug, as shown and described. 